Apparatus for making wrench nuts



NOV. 21, 1950 JOHNSON 2,530,968

APPARATUS FOR MAKING WRENCH NUTS Filed June 26, 1947 INVENTOR.

Patented Nov. 21, 1950 UNITED STATES PATENT QFFECE APPARATUS FOR MAKINGWRENCH NUTS Application June 26, 1947, Serial No. 757,115

This invention relates to improvements in apparatus for making wrenchnuts so-called. That is, nuts having flat sides such as are used inconnection with wrenches, pliers and the like.

The principal objects of the invention are the provision of simple andefficient means for forming nuts having flat substantially parallelsides, and as special features of the invention, the apparatus is easyto operate and provides nuts which are uniform in all importantcharacteristics.

With the foregoing and various other novel features and advantages andother objects of my invention as willbecome more apparent as thedescription proceeds, the invention consists in certain novel featuresof construction and in the combination and arrangement of parts as willbe hereinafter more particularly pointed out in the claim hereuntoannexed and. more fully described and referred to in connection with theaccompanying drawings wherein:

Fig. 1 is a front elevational view of apparatus embodying the novelfeatures of the invention;

Fig. 2 is a plan view of the apparatus shown in Fig. 1;

Figs. 3 and 4 are plan views of a nut blank and r a nut, respectively,completed in accordance with the invention; 7

Figs. 5 and. 6 are edge views of the nuts shown in Figs. 3 and 4; and

Figs. '7 and 8 are plan and side elevational views respectively of a nutholder forming a part of the invention. g

Referring now to thedrawings more in detail, the invention willbe fullydescribed.

A carrier is provided which is represented in part by 2 and may consistof a plurality of links pivoted as at 6 to form a continuous chain whichmay be supported in the normal way as by passing around spacedsupporting and driving sprockets.

Holders 8 are provided which have longitudinal extending central bossesit. These bosses are provided intermediate the ends thereof withrecesses or sockets l2 and the bottoms M of said sockets are disposed inplanes slightly above the planes it of the upper sides of the holdersadjacent the longitudinal portions iii.

A nut blank it is shown in Figs. 3 and 5 and such blanks are receivablein the sockets of the holders. The portions It of the holders are ofless width than the diameter of the nut blanks 18 as is indicated inFig. '7, so that opposite marginal portions of the blanks projectoutwardly beyond the sides of the holder portions to.

With the :carrier links arranged for movement 1 Claim. (CI. 82)

2 in a certain direction and have the holders associated therewith,blanks are inserted by any convenient and suitable means in the socketsof the holders.

A bracket 20 is secured to a support 22 and it has a longitudinal slot24 therein. A plate 26 overlies the bracket 20 and is secured thereto insuch a manner as to close the forward open side of the slot.

A hold-down device 28 is disposed in the slot 24 of the bracket and ispivoted at 30. A screw 32 is in threaded engagement with the bracket sothat its inner end extends into the slot thereof and a spring ddtherearound is disposed in a socket 36 provided in the inner end of thehold-down device 28 so as to urge the hold-down device 28 in a clockwisedirection as viewed in Fig. 1.

The outer or left hand end of the hold-down device is provided with afoot portion 38.

The carrier support and bracket are s relativel positioned that as thecarrier moves in the direction of arrow A, the foot 38 engages the uppersides of the nut blanks to hold them in the sockets of the holders, thespring 34 tensioning the holddown device, whereby the nut blanks areyieldingly held in their sockets.

Cutters 4i] rotatable b means of an arbor 42 are disposed to straddlethe nut blanks and act thereon as the carrier moves the blanks past orthrough the cutters.

As the blanks are moved through or between the cutters, the cutters acton opposite sides of the blank to remove portions thereof and provideflat sides 44 as shown in Figs. 4 and 6.

Thus, nut blanks carried in the sockets of the holders of the carrierare successively acted upon by movement of the chain or other carrier soas to provide the flat opposite sides, the hold-down device functioningto yieldingly hold the blanks in position in the sockets for the actionof the cutters.

The cutters may take any ordinary form best suited for the particularwork at hand and they may be operated at such a speed as willefiiciently and economically provide the flat sided nuts.

The invention may be embodied in other specific forms without departingfrom the essential characteristics thereof. Hence, the presentembodiments are therefore to be considered in all respects merely asbeing illustrative and. not as being restrictive, the scope of theinvention being indicated by the appended claims rather than by theforegoing description, and all modifications and variations as fallwithin the meanin and purview and range of equivalency of the appendedclaim are therefore intended to be embraced therein.

What it is desired to claim and secure by Letters Patent of the UnitedStates is:

Apparatus for removing opposite sides of nut blanks projecting fromopposite sides of blank holders comprising in combination, a supporthaving a pair of axially spaced cutters rotatable on a horizontal axistherein for operating on opposite sides of nut blanks, a bracket securedto said support at one side of said cutters and extending awaytherefrom, said bracket provided with an elongated slot in' a forwardface and disposed transversely. relative to the axis of rotation of saidcutters, an elongated'plate secured to the forward face of said bracketand closing said slot, a hold-down disposed in said slot and pivotalconnections between said bracket and hold-down for swinging of saidhold-down up and down in opposite directions, one end portion'of saidhold down extending from one end of said slot and bracket disposedbetween said cutters extending below the axis of rotation REFERENCESCITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 582,887 Timm May 18, 1897 965,184Henn July 26, 1910 1,212,606 Brightman Jan. 16, 1917 1,277,367 BlasierSept. 3, 1918 1,465,453 Nevin Aug. 21, 1923 1,624,180 Pellow Apr. 12,1927 1,665,474 Pellow Apr. 10, 1928

